# coding: utf-8
# -------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
# -------------------------------------------------------------------------
import threading
import logging
import time
import json
import os
from websocket import WebSocketApp
from typing import List, Optional
from azure.messaging.webpubsubservice import WebPubSubServiceClient

logging.basicConfig(level=logging.DEBUG)
LOG = logging.getLogger()


class WebsocketClientsManager:
    """
    This class contains multiple websocket clients which are connected to Azure Web PubSub Services.
    """

    def __init__(self) -> None:
        self.clients = []
        self.connection_ids = []
        self.recv_messages = []

    def add_client(self, service: WebPubSubServiceClient, user_id: str, groups: Optional[List[str]] = None):
        def on_message(websocket_app: WebSocketApp, message: str):
            message = json.loads(message)

            if message["type"] == "message":
                self.recv_messages.append(message["data"])

            if message["type"] == "system" and message["event"] == "connected":
                self.connection_ids.append(message["connectionId"])

            LOG.debug(message)

        def on_open(websocket_app: WebSocketApp):
            LOG.debug("connected")

        token = service.get_client_access_token(groups=groups, user_id=user_id)
        client = WebSocketApp(
            token["url"], subprotocols=["json.webpubsub.azure.v1"], on_open=on_open, on_message=on_message
        )
        self.clients.append(client)

    def start_all(self):
        for client in self.clients:
            wst = threading.Thread(target=client.run_forever, daemon=True)
            wst.start()

        LOG.debug("Waiting for all clients connected...")
        while len(self.connection_ids) != self.client_number:
            pass

    @property
    def client_number(self):
        return len(self.clients)


def test_overall_integration(webpubsub_connection_string: str):
    # build a service client from the connection string.
    service = WebPubSubServiceClient.from_connection_string(
        webpubsub_connection_string, hub="hub", logging_enable=False
    )

    # build multiple websocket clients connected to the Web PubSub service
    clients = WebsocketClientsManager()

    for i in range(5):
        clients.add_client(service, user_id="User%d" % clients.client_number, groups=["InitGroup"])
    clients.start_all()

    # test naive send_to_all
    service.send_to_all(message="Message_For_All", content_type="text/plain")  # N messages

    # test if generating token with the initial group is working
    service.send_to_group(group="InitGroup", message="Message_For_InitGroup", content_type="text/plain")  # N messages

    # test if parameter "filter" in send is working
    service.send_to_all(
        "Message_Not_For_User0", filter="userId ne 'User0'", content_type="text/plain"
    )  # N - 1 messages

    # test if remove_connection_from_all_groups works
    group_names = ["Group%d" % i for i in range(3)]
    for group in group_names:
        service.add_connection_to_group(group, clients.connection_ids[0])
        service.send_to_group(group, "Message_For_RemoveFromAll", content_type="text/plain")

    service.remove_connection_from_all_groups(clients.connection_ids[0])

    for group in group_names:
        service.send_to_group(group, "Message_For_RemoveFromAll", content_type="text/plain")

    # other tests
    service.send_to_user("User0", message="Message_For_User0", content_type="text/plain")  # 1 messages

    time.sleep(5)

    LOG.info("Received Message: ", clients.recv_messages)
    assert service.group_exists("InitGroup") == True
    assert clients.recv_messages.count("Message_For_All") == clients.client_number
    assert clients.recv_messages.count("Message_For_InitGroup") == clients.client_number
    assert clients.recv_messages.count("Message_Not_For_User0") == clients.client_number - 1
    assert clients.recv_messages.count("Message_For_User0") == 1
    assert clients.recv_messages.count("Message_For_RemoveFromAll") == 3
    LOG.info("Complete All Integration Test Successfully")


if __name__ == "__main__":
    try:
        connection_string = os.environ["WEBPUBSUB_CONNECTION_STRING"]
    except KeyError:
        LOG.error(
            "Missing environment variable 'WEBPUBSUB_CONNECTION_STRING' - please set if before running the example"
        )
        exit()

    test_overall_integration(connection_string)
